A track of my hike can be found here: http://www.mapmyrun.com/workout/251262798
Redbird Hollow trail runs between some parking off Given road (39.173578, -84.318651) and Stephan Field park in Indian Hill, Ohio (39.179032, -84.344790) These are the only access points to the trail. The L19 trail is a spur trail off the mona trail. It's the same trail GC32FB "Above the Falls II" is on. The trailhead for this spur is located at N39 10.255 W84 20.275. This cache is located at the dead end of the trail. The only apporach is from the trailhead. I walked the length of the Redbird hollow and the 2 spur trails. It's about 5 miles.